OK....another decoding question.......

My Galen book says L= Dart V8, 4=GT, 4=1964, and 5=LA built. (answering D/Dart man's post)
Page 47 shows '64 body codes (fender tag) for LA. Each plant was different for a 64 A-body. Lynch Road, ST Louis, Hamtrack or LA.

For LA, Galen's book only shows sales codes for A trans, C Engine, H Radio and L heater. Unconfirmed/unknown for the rest.